The Research Of The Humid Condition And Dehumidification Of Residential Bathroom In Guangzhou

The annual average relative humidity is up to 78% in Guangzhou which is lies in the southern coast. Every time when it comes to rainy period in the winter and spring turn, the humidity keeps in above 99%. So it is necessary for us to do the dehumidification of the bathroom. In this paper, the experimental study will be used to measure the humid conditions of good and poor outdoor humid environment respectively. Experimental results show that when the outdoor humid environment is good, using mechanical ventilation can make the humidity in the bathroom decrease to below 70% within 10 minutes. But when the outdoor humid environment is poor, totally relying on mechanical ventilation can not meet the requirements of the dehumidification. Bathroom humidity is decreased to 92% in 60 minutes after ventilation. The air humidity is decreased to 94% in 10 hours by using no mechanical exhaust. Therefore, it is necessary to join other dehumidification to the bathroom humidity control.In this paper, the two methods of dehumidification were used to test the effect of removing dampness in the bathroom: solid desiccant(silica gel) and air heating. The experimental results show that solid hygroscopic agent can effectively reduce the humidity of the air inside the bathroom. However due to filling layer thickness, it resulted in a slight difference in the quality of dehumidification effect. In the air heating experiment, the effect of dehumidification in two air supply temperatures, the 50 and 30 degrees Celsius, were being tested. At last, the dehumidification capacity was calculated. The dehumidification capacity is 103.2g/h by using only mechanical ventilation. And the dehumidification capacity is 309.6g/h by using solid hygroscopic agent. Then the dehumidification capacity is 438.6g/h by heating air. The results show that air heating dehumidification is the most efficient. But it also brings the higher energy consumption. The effect of dehumidification of solid desiccant is worse than air heating. Nevertheless it is estimated that the energy consumption of solid desiccant is less than one-third of that of heating air.